Wrench



NITED STATES PATENT OFFICE.

AUGUST KINDERMANN, OF CLEVELAND, OHIO.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 338,078, dated March 16, 1886.

(No model.)

To @ZZ whom, it may concern.-

Be it known that I, AUGUsr KINDERMANN, acitizen of the United States, and a resident of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Vrenches, of which the following is a description.

The invention relates to that class of wrenches in which a sliding jaw is adjustable toward or from a fixed jaw, and in which the relation of the several parts is such that the pressure upon the nut or other object which is gripped by the jaws is increased in exact pro portion to the increase of the force exerted upon the handle of the wrench.

Theinvention consists in certain improvements in the details of construction in a wrench of the character above described, whereby the strength ofthe same isincreascd, whereby it is made readily and conveniently operable in difficult situations, and whereby it is readily convertible from a nut-wrench into a pipe-wrench.

In the drawings, Figure l is a side elevation ofthe wrench. Fig. 2 is an elevation of the interior face of the sliding jaw. Fig. 3 is a side elevation of the sliding jaw. Fig. 4 is an irregular section on the broken line a" x of Fig. 8. Fig. 5 s a View similar to that shown in Fig. 4, showing a modified form of construction of portions of the device.

A is the fixed jaw, the rearwardly-projecting-shank A2 of which is centrally slotted to receive the middle, recessed portion (best seen in Fig. 2) of the sliding jaw B, and is provided with a perforation, a, to receive a pin, A, by whichv the jaw is pivotally connected to the handle C, which has a corresponding perforation, c, through which also the pivot-pin A extends. Near the rear extremity of the shank of the fixed jaw it is provided with a curved or segmental slot or perforation, a', to receive a pinch-screw, a", which is adapted to engage with a threaded cavity, c, in the face of the handle C. The projecting portion of the face of the jaw B, near the vertical center of the jaw, is provided with a dovetailed recess or groove,b, to receive a corresponding dovetailed slide, E, which at its upper extremity terminates in a beveled portion, e, the lower extremity of which projects slightly outward from the main body of the slide, and terminates in a tooth, e', and which in its lower portion is provided through it, as seen in Fig. 2. The pin e, when the slide is in its most elevated position, is brought into contact with a shoulder or stop, d, upon the face of the jaw.

In each of its lateral faces the jaw B has a shallow fan-shaped recess, b, to receive respectively the right and left members, D D.

either extremity, being formed in each of the clasping parts or jaws D to receive a pin, d, which extends through the middle recessed portion of the jaw B from side to side thereof.

The j aws A and B are provided,respectively, with inclined faces Fand F on either side thereof. The curved end portion of the handle C has a central slot or cavity, C', to receive the rear end of the link D, which at this as well as at the opposite end has a short slot, which at either extremity is curved to suitably t a second pivot-pin, d. The inner or engaging face of the fixed jaw A is preferably provided with arecess, 2, as seen in Fig. l, which extends across the same.

In Fig. 5 the linkD is shown as of uniform thickness from end to end, instead of being forked, as in Fig. 4, and the jaw Bis shown as provided with a central slot, instead ofthe two lateral recesses b", as in that figure, and this construction may be adopted when the Wrench is made of small dimensions for light work. Ordinarily, however, the construction shown in Fig. et will be preferred, as insuring greater firmness and strength.

It will be observed that the perforation c for the pivot-pin A is formed in the solid portion of the handle at a considerable distance from the end of the handle and from the slot or cavity in the same-a construction which obviates all liability to fracture ot' the handle by reason of strain upon the pivot-pin. The jaw B will be moved toward the fixed jaw by movement of the handle in the direction of the arrow Ashown in Fig. 1, while a reverse movement of the handle will withdraw it.

By reason of the provision of the slide E the device may be instantly adapted for use as a pipe-wrench, the projecting tooth e being brought into contact with the body of the with a pin, e, which extends transversely of a link, D, which connects the jaw B and the handle C together, a slot, d, curved at IOO pipe at a jaw A.

The provision of the inclined faces F and F renders it practicable to apply this portion of the wrench in situations in which an ordinary wrench, or the upper ends of the jaws of this wrench, could not be brought to bear.

The provision of the pinch-screw permits adjustment of the jaws to nuts of any given size, and prevents the fall of the handle on its pivot when the wrench is applied where the nut is difcult of access-as, for instance, when the nut is directly .over the head of the operator, or when it is near the tloor.

Through the provision of the slots d in the link D a movement of the link upon its pins d is permitted, so that when the handle is moved to close the jaws the force of the pressure exerted upon the link is brought to bear directly upon thejaw and upon the handle, andthe pins are wholly relieved.

I have described the wrench as provided point opposite the recess? in the with a curved Slot, a", in both members ofthe shank ot" the jaw A; but it is obvious that a single slot and a single pinch-screw will be sufficient to effect the described adjustment of the parts. v

It' will be understood that the slide E is so tted within the groove b as to be maintained in adjustment by frictional contact alone.

Having described my invention, I claiml. The combination of' the jaw-A, having the curved slot a', the pinch-screw a, and the handle C, pivotally connected to thejaw A, and carrying the slidingjaw B.

2. The combination, in a wrench, of a fixed recessed jaw, and a jaw which is slidable upon the shank of the iiXed recessed jaw and which is provided on its engaging face with an adjustable slide, which carries an engaging-tooth, which, when the slide is adjusted inwardly, rests against the shank of the xed jaw, and which, when the slide is in its outward adj ustinent, is opposite the recessed portion of the fixed jaw.

3. A wrench one of the jaws of which is provided'with a groove', in which is a slide which carries a projecting tooth, the body of the slide being contained withinthe groove in the jaw, and the body of the tooth being transverse to the face 'of the jaw and outside the body thereof', so that when the tooth is not in position for engagement the face of the jaw is left plainv and unobstructed.

4. A wrench one of the jaws of which is provided on its engaging face with an adjustable slide, E, for engagement with a pipe or other object which has a curved or rounded surface.

5. The combination, with the fixed jaw A, of the sliding jaw B, groove@ 3S described-.and carrying the adjustable slide E, substantially as set forth.

6. The combination, with; the jaw A, having recess 2', ofl the jaw B, having groove b and slide E. f

, 7'. The combination; with the jaw A, hav# ing recess 2, and inclined faces F, of l,the jawV B, having Slide E and inclined faces F.

8. The combination, with the jaw A,` having recess 2, and pivotally connected to the handle 0 Ofthe jaw B, having Slide E, and connected by link D tothe handle C, l

9. The combination of the jawk B, having recesses b b, the handle C, having cavity Q', and the link D, having the-members D D.

10. The combination,A with the jaw Band the handle C, ofthe link D, having thc'sl'ots d at the ends thereof, whereby when the sliding jaw B is moved toward the fixed jaw the pins ci are relieved from strain.

1l. The combination, with the jaw B, hav-A which extends through the unsl'otted portionv of the handle.

AUGUST KIND-ERMANN. j

Witnesses:

WILLIAM Dones, WALTER' S. Dones. 

